grok 4 1 fast

The tag grok 4 1 fast refers to xAI's Grok 4.1 Fast model, which is now available as a preview in Microsoft Copilot Studio for enterprise agent builders. This low-latency, tool-oriented text model supports very large context windows and deep tool integrations. It is available in early access for US-based makers and is off by default until an organization administrator opts in. Microsoft and xAI note that Grok runs outside Microsoft-managed hosting, and customer prompts and responses are not retained or used for training xAI's models, with data protection responsibilities falling under xAI's enterprise agreements.